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Astronauts Ready for Second Spacewalk to Repair Station

Astronauts aboard the International Space Station are planning a second and final spacewalk early Tuesday to fix the outpost's cooling system, a NASA official said. NASA astronauts Rick Mastracchio and Mike Hopkins are expected to leave the station's Quest airlock to install a new ammonia pump, space station flight director Judd Frieling said during an interview on NASA Television on Monday. During an initial spacewalk on Saturday, Mastracchio and Hopkins removed a failed pump,...

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